fall about

US /fɔːl əˈbaʊt/
UK /fɔːl əˈbaʊt/
"fall about" picture
1.

笑得前仰後合, 笑得打跌

to laugh uncontrollably

:
The comedian was so funny, we were all falling about.
那個喜劇演員太好笑了,我們都笑得前仰後合
Every time he told that joke, people would just fall about.
每次他講那個笑話,人們都會笑得前仰後合